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🌊 Marine Least Concern 🌡️ Deep-water

Galathea assfish

Bassozetus galatheae Nielsen & Merrett, 2000
Max Length
55.5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.7
Depth
1680–1800 m
Climate
Deep-water
Resilience
Medium
Vulnerability
49.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

A benthic species found on the continental slope . Reproductive strategy possibly similar to other members of this family featuring oviparity, with oval pelagic eggs floating in a gelatinous mass . Of the 22 examined specimens 16 are males, including a 55.5 crn SL specimen with spent testes. One of the six females measuring 23.2 cm SL had fully ripe ovaries with eggs of about 0.5 mm in diameter. These were caught on or near the bottom mostly at slope depths but also extending into the abyss. Identifiable contents from the digestive tract found in six specimens include scales and vertebrae from fish, dorsal felt from polychaetes and remains of crustaceans .

Scientific Name
Bassozetus galatheae
Authority
Nielsen & Merrett, 2000
Habitat
Marine
Climate
Deep-water
IUCN Status
LC
Max Length
55.5 cm
Depth Range
1680–1800 m
Trophic Level
3.7
Resilience
Medium
Vulnerability
49.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

This species is distinguished by the following characters: body elongate, tapering caudally, scales on head and body rather small with 25-35 oblique scale rows, snout rather pointed, mouth terminal, a single basibranchial tooth patch with a slight constriction centrally and a v-shaped vomer, sagittal otolith large with a small sulcus and no ostial channel, dorsal fin-rays 132-142, anal fin-rays 108-114, pectoral fin-rays 26-29, ventral fin-rays not reaching anus, total number of vertebrae 71-76, long gill rakers on anterior arch 14-17 .

🌀 Behaviour

Behavioural data for Galathea assfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; bathydemersal; depth range 1680 - 1800 m . Deep-water

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
3.7±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.0038 × L3.14 (TL)
Max TL
55.5cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
49.00/100
Moderate-High vulnerability
Trophic Level
3.7
Predator
Climate Zone
Deep-water
Described By
Nielsen & Merrett, 2000

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

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